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Yahoo iOS & Android App Lost Responsiveness

Hi, I've just been working on a custom email template for work and I've just been testing it and I've noticed that the responsiveness of my e-mail has dropped off and is showing me the desktop version. I've used my normal framework template which I've used for months without any issues.

Does anyone know if Yahoo have updated anything on there side which could cause this issue? I'm keen to get this issue fixed as I've spent a few days making my framework which was responsive in the Yahoo mail app on iOS & Android.

Please note: The email framework is all fine on, DESKTOP Yahoo, gmail, outlook.com MOBILE Gmail app ( you even get the mobile version / responsive ) iOS mail app, outlook app... Again it's just on the Yahoo mail app and was all working fine last week.

I've figured this out. It's not just media queries. Yahoo now strips the whole content of any <style> tag. This happens on every Yahoo mobile client (iOS, Android, mobile webmail), but not on the desktop webmail. If a <style> tag ends with a media query declaration, Yahoo will only leave a closing curly bracket }.

You can easily see this by inspecting your code in the mobile webmail.

YES! Thanks for testing Rémi! I knew there was something wrong with it. I'm just glad more people are noticing it, Hopefully it'll get fixed at some point soon! Do you know of any support page to report this to yahoo?

**If anyone else is having this issue post in this thread to log it. Hopefully someone from yahoo will see it! **

I think the best way to contact them is via twitter. I've looked on their site and they don't anyway to contact them regarding it. So I think the best thing to do is keep tweeting to the @yahoomail account. I'll keep you all posted if I hear anything back!

Hello Richard. I haven't noticed any change on my side on Yahoo Mail app in iOS 8.4. The last update of the Yahoo Mail app on iOS was on July, 13, and on June 17th on Android. But I don't think this is related, as I believe both use the system wide WebKit engine to render emails. And as far as I have tested, the CSS filtering rules from Yahoo are the same on the desktop webmail than on the mobile apps. So it might be something else.

Have you changed anything on your side in the past few weeks ? (ESP, system update in Android or iOS, …)

Hi Rémi thanks for getting back to me. I've not changed anything that would effect it in this way.
I've tested an older framework which always has been responsive in the yahoo mail app, but now it's no longer is... I've taken screenshots of the old framework that's never had any issues in the past.

As you can see in the screenshots, you can see that the my older framework does respond fine and this framework was used on the Friday the 31st.
OLD FRAMEWORK SENT ON: Friday 31st July 2015 ( this was all fine and responded perfectly )http://s27.postimg.org/k23glpm83/Perfect.jpg

Are these screenshots from the exact same application taken at the same moment ? If so, this means that the problem doesn't come from the app itself. What service do you use to send your email ? Also, do you have any third party content included in your email ? (like a tracking spacer for example)

Hi, yes these images were taken today with about 30 seconds between them. I just check the first screenshot again in the iOS app which was perfect today and now it's lost it's responsiveness. ( second screenshot ) I normally send via MailChimp which I never have any issues with. I did send myself a test email via CampaignMonitor and it's the same issue. I don't use any other 3rd party content. All images are linked to S3 on amazon also.

I had a search on Twitter before and I noticed that people having issues with yahoo mail as I think there servers went down... So hopefully this is just a temporary issue or effecting some accounts. Do you have Yahoo mail on your phone? iOS or Android if so if you send yourself a test email you might see the same thing. Or view a really old email that you know is responsive and keep going back to it and see if it changes.

You're right ! I just tested a simple email with a few media queries test, and I now see that none are working in Yahoo Mail on iOS 8.4. And it's not working on the mobile webmail version of Yahoo either. Another thread has reported this as well.